#menu_background .slidemenu ul li ul {
  visibility: collapse;
}

#menu_background .slidemenu ul li ul li a:hover {
  visibility: visible !important;
}

#menu_background .slidemenu li:hover ul{  
display: block;
}



.portfolio-one li { float:left;}
.portfolio-two li { float:left;}
.portfolio-three li { float:left;}
.portfolio-four li { float:left;}
